20421050

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:467

約数の個数: 48

約数和(自身を含む): 41481720

約数和(自身を除く): 21060670

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 89, 130, 178, 325, 353, 445, 650, 706, 890, 1157, 1765, 2225, 2314, 3530, 4450, 4589, 5785, 8825, 9178, 11570, 17650, 22945, 28925, 31417, 45890, 57850, 62834, 114725, 157085, 229450, 314170, 408421, 785425, 816842, 1570850, 2042105, 4084210, 10210525, 20421050]

約数ペア:

[(1, 20421050), (2, 10210525), (5, 4084210), (10, 2042105), (13, 1570850), (25, 816842), (26, 785425), (50, 408421), (65, 314170), (89, 229450), (130, 157085), (178, 114725), (325, 62834), (353, 57850), (445, 45890), (650, 31417), (706, 28925), (890, 22945), (1157, 17650), (1765, 11570), (2225, 9178), (2314, 8825), (3530, 5785), (4450, 4589)]